# Build vs Recall

The clearest difference is in-app purchases: Build at none against Recall's 3. Build also leads on update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Recall sells 3 in-app purchases, starting at $2.99 per month. Build asks for nothing beyond the download.

Build ships an update fortnightly, Recall every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Build | Recall |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/build-a-math/id1521174530/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free | — |
| Size | 1 MB | 13 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Weiran Ye](https://appshunter.io/developer/481592104) | [Lumen Labs](https://appshunter.io/developer/1896764763) |

## What reviewers say

### Build

[App page](https://appshunter.io/ios/app/build-a-math/id1521174530)

This app offers short, focused math drills for addition, subtraction, multiplication, and division. It provides instant feedback and tracks progress through engaging sessions designed for quick practice.

**Highlights:** Short, focused math practice sessions, Master addition, subtraction, multiplication, division, Instant feedback with haptics, color, and sound, Smart question rotation for confidence, Progress tracking and summaries, Works offline, no ads, no accounts

**Features:** macOS Compatibility

**In-app purchases:** none


### Recall

[App page](https://appshunter.io/ios/app/recall-flashcards-and-fsrs/id6776958002)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $2.99 | per month |
| Pro (Annual) | $9.99 | per year |
| Lifetime Pro | $19.99 | one-time |


## Frequently asked questions

### Is Build free?

Build is free to download, with no in-app purchases.

### Is Recall free?

Recall is free to download, with in-app purchases available.

### Do Build or Recall have ads?

Neither Build nor Recall shows ads.

### Which is updated more often, Build or Recall?

Build ships an update fortnightly, and Recall every 2 months. Most recently, Build was updated on October 24, 2026 and Recall on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*